applause] they are being led by second grade teacher miss yang, miss vantia, miss bryant, and miss petrokie. i think our principal is in here somewhere. ok. there is our principal, rosa song. there she is. [applause] all right. we are ready. ♪ [piano playing] ♪ [piano playing] [piano music playing] [applause] [piano playing] [applause] [piano playing] >> give it up one more time for the mckinley elementary second and third graders. [applause] >> i'd like to acknowledge scott wiener. thank you for joining us. i'd like to acknowledge my colleague, sandy, for joinin gus. -- joining us. and at this time, i'd like to welcome ed lee, the mayor of san francisco. [applause] >> thank you, hydra and mckinley students. thank you very much. supervisor weiner, i thin kwe k we have the official song, next time i go t otho the boardf supervisors, we need side by side. we ain't got a barrell of money. thank you for coming today. i want to say that i remember an episode, when i was in elementary school, when i was brought down to the principal's office. now i get to seek revenge by having the principles com